LA4805 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA4805

3 V Stereo Headphone Power Amplifier

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Symbol

VDC (V)

28

LOW BOOST NF

1.1

LA4805V

Equivalent circuit

Unit (resistance: Ω)

Pin function

• Low boost NF pin

29

L.P 1

1.1

• Low boost primary low pass pin

30

MUTE SW

0 to 2.2

• The muting function is on when this pin is

floating and off when connected to VCC

through a 100 kΩ resistor.

External Component Functions: Recommended values are indicated in parentheses.

• C1, C3 (1 to 4.7 µF)

Input coupling capacitors

• C2, C4 (2200 pF)

Input high pass capacitors. The high region gain when low boost is on is determined by the IC internal 18 kΩ resistance

and these external 2200 pF capacitors.

• C5, C6 (0.1 to 1 µF)

Mixer amplifier to power amplifier coupling capacitors

• C7, C8 (3.3 to 10 µF)

Reference bias (Vref) decoupling capacitors

• C9 (10 to 22 µF)

Determines the PVSS recovery time.

• C10 (0.1 to 1 µF)

Beep input coupling capacitor. Be sure that this capacitor does not attenuate the beep signal.

• C11, C12 (4.7 to 10 µF)

Ripple filter capacitors. Care is required selecting their value, since although increasing the capacitance increases the

ripple exclusion ratio, it also increases the rise time when the power is turned on.

• C13 (3.3 to 4.7 µF)

Smoothing capacitor for PVSS on/off switching noise

No. 4469-9/17

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